Serway_CP_poll_ch21

# Serway_CP_poll_ch21 - An ac series circuit has 12 ohms...

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An ac series circuit has 12 ohms resistance, 15 ohms If an effective emf of 120 V is applied to the circuit, then what is the effective (rms) current value? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 3.3 A 2. 4.0 A 3. 9.2 A 4. 36.0 A

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is 120 V(rms), what is the output voltage? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 480.0 V 2. 60.0 V 3. 15.0 V 4. 10.0 V
An ac series circuit has 12 ohms resistance, 15 ohms If an effective (rms) emf of 120 V is applied, what is the power output? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 1200 W 2. 1108 W 3. 1022 W 4. 598 W

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2000 secondary coil. If the current in the secondary is 3.0 amps, what is the primary current? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 0.75 A 2. 1.33 A 3. 12.0 A 4. 48.0 A
In an ac series circuit, the current in a pure resistor differs in phase with the applied voltage by what angle? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. zero 2. 45° 3. 90° 4. 180°

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In an ac series circuit, the voltage in the inductor differs in phase with the voltage in the capacitor by what angle? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. zero 2. 45° 3. 90° 4. 180°
The capacitive reactance in an ac series circuit will change by what factor when the frequency is tripled? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 1/3 2. 1/9 3. 3 4. 9

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20 A will have what effective (rms) current? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 28.2 A 2. 7.1 A 3. 14.1 A 4. 20.0 A
In the inductor of a 60 cycle ac series circuit, the peak voltage precedes the peak current in each cycle by what time intervals? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 2.1 x 10 -3 s 2. 4.2 x 10 -3 s 3. 8.3 x 10 -3 s 4. 16.7 x 10 -3 s

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An ac series circuit with 12 ohms resistance, 15 ohms has how many ohms of impedance? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 37.0 W 2. 27.7 W 3. 21.9 W 4. 13.0 W
An ac series circuit with 12 ohms resistance, 15 ohms inductive reactance and 10 ohms capacitive reactance has what phase angle? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 22.6° 2. 18.4° 3. 87.0° 4. 67.4°

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is 1 cm 2 , what are the maximum values of E and B? ( = 4 π x 10 -7 T-m/A) 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 4 x 10 7 V/m, 0.3 T 2. 3 x 10 8 V/m, 1.0 T 3. 2 x 10 9 V/m, 7.0 T 4. 5 x 10 6 V/m, 0.1 T
A solar cell has a light-gathering area of 10 cm 2 and produces 0.2 A at 0.8 V (DC) when illuminated with

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Serway_CP_poll_ch21 - An ac series circuit has 12 ohms...

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